The fragmentation of culture is also the fault of social media (and all media to a lesser extent). It's far easier to get sucked in to echo chambers where other opinions are mocked or shut out.
In the past we all got our news from Walter Cronkite.
In the past we all got our news from Walter Cronkite.
Suffering it, over and over and over, was what led humanity down the natural, logical path to becoming civilised and cooperative.
It's the lesson we need to learn well, if our self-appointed badge of Very Intelligent Species is to actually mean anything more than a pointless, neverending game of forming factions and battling other factions.